HIGH 8.7 NVD
CVE-2026-123565
Sveltejs devalue before 5.9.3 contains a resource exhaustion vulnerability where repeated primitive strings cause quadratic expansion in the uneval function. At
Sveltejs devalue before 5.9.3 contains a resource exhaustion vulnerability where repeated primitive strings cause quadratic expansion in the uneval function. Attackers can supply a small crafted payload that is parsed and then passed to uneval, producing a very large serialized string that exhausts memory or CPU.
References
- https://github.com/sveltejs/devalue/security/advisories/GHSA-mcm9-63f2-9j32
- https://www.vulncheck.com/advisories/devalue-before-5.9.3-quadratic-expansion-denial-of-se
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-11-08 via NVD.
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